:root {
  --ink: #0f1b33;
  --muted: #5b6b86;
  --line: #e3e9f3;
  --bg: #ffffff;
  --bg-alt: #f4f7fc;
  --blue: #1d5bff;
  --cyan: #19c3e6;
  --grad: linear-gradient(120deg, #1d4fe0 0%, #1d7bff 45%, #19c3e6 100%);
  --radius: 18px;
  --shadow: 0 18px 50px -20px rgba(18, 52, 120, .28);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.01em; }
.wrap { width: min(1160px, 100% - 40px); margin: 0 auto; }
.narrow { width: min(780px, 100% - 40px); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.82); backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.nav-links { display: flex; gap: 26px; margin-left: auto; color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--ink); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 24px; border-radius: 12px; background: var(--grad); color: #fff; font-weight: 600; box-shadow: 0 10px 24px -10px rgba(29,91,255,.6); transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 30px -10px rgba(29,91,255,.7); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 10px; }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
.btn-ghost:hover { box-shadow: var(--shadow); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 84px 0 96px; background:
  radial-gradient(900px 480px at 85% 10%, rgba(25,195,230,.16), transparent 60%),
  radial-gradient(800px 500px at 10% 0%, rgba(29,91,255,.12), transparent 60%); }
.hero-grid { display: grid; grid-template-columns: 1.02fr 1fr; gap: 56px; align-items: center; }
.eyebrow { margin: 0 0 14px; font-size: 13px; font-weight: 700; letter-spacing: .16em; color: var(--blue); }
h1 { font-size: clamp(36px, 4.6vw, 56px); font-weight: 800; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { margin: 22px 0 30px; font-size: 18px; color: var(--muted); max-width: 34em; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 0; margin: 28px 0 0; list-style: none; color: var(--muted); font-size: 14px; }
.hero-points li::before { content: "✓"; color: var(--cyan); font-weight: 700; margin-right: 6px; }

/* App mock */
.mock { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 40px 80px -30px rgba(18,52,120,.35); overflow: hidden; transform: perspective(1400px) rotateY(-6deg) rotateX(2deg); }
.mock-bar { display: flex; align-items: center; gap: 7px; height: 36px; padding: 0 14px; background: #f3f6fb; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.mock-bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.mock-bar i:nth-child(2) { background: #febc2e; } .mock-bar i:nth-child(3) { background: #28c840; }
.mock-bar span { margin-left: auto; margin-right: auto; transform: translateX(-24px); }
.mock-body { display: grid; grid-template-columns: 150px 1fr; min-height: 340px; font-size: 12.5px; }
.mock-side { display: flex; flex-direction: column; gap: 2px; padding: 14px 10px; background: #f7f9fd; border-right: 1px solid var(--line); color: var(--muted); }
.ms-logo { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; color: var(--ink); font-size: 12px; }
.ms-logo img { width: 22px; height: 22px; }
.mock-side span { padding: 6px 9px; border-radius: 8px; }
.mock-side .on { background: #e6eeff; color: var(--blue); font-weight: 600; }
.mock-side hr { width: 100%; border: 0; border-top: 1px solid var(--line); margin: 6px 0; }
.mock-main { padding: 16px; display: flex; flex-direction: column; gap: 12px; background: #fbfcfe; }
.mock-account { display: flex; align-items: center; gap: 10px; padding: 10px 12px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.mock-account img { width: 34px; border-radius: 8px; }
.mock-account small, .mock-accel small { display: block; color: var(--muted); font-size: 11.5px; }
.mock-account em { margin-left: auto; font-style: normal; font-size: 11.5px; padding: 4px 10px; border-radius: 8px; background: var(--grad); color: #fff; }
.mock-table { background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.mock-table .row { display: grid; grid-template-columns: 1.3fr 1fr .7fr; padding: 8px 12px; border-top: 1px solid var(--line); }
.mock-table .row.head { border-top: 0; background: #f6f8fc; color: var(--muted); font-size: 11.5px; }
.mock-table .ok { color: #13a86b; font-weight: 600; }
.mock-accel { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 12px; background: linear-gradient(120deg, #eaf1ff, #e5f8fc); border: 1px solid #d6e5ff; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #13c47a; box-shadow: 0 0 0 4px rgba(19,196,122,.18); animation: pulse 2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(19,196,122,.06); } }

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.sec-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.sec-head h2, .split h2, .download h2 { font-size: clamp(28px, 3.2vw, 38px); font-weight: 800; }
.sec-head p:not(.eyebrow) { color: var(--muted); margin: 14px 0 0; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .2s, box-shadow .2s; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.ic { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 18px; border-radius: 12px; font-size: 22px; background: linear-gradient(135deg, #e8efff, #e2f7fb); }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Acceleration */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.lead-sm { color: var(--muted); margin: 16px 0 24px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { padding: 14px 16px; background: #fff; border: 1px solid var(--line); border-radius: 12px; color: var(--muted); font-size: 15px; }
.checks b { color: var(--ink); }
.flow { display: grid; grid-template-columns: auto 1fr; gap: 0; align-items: center; padding: 40px 32px; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.flow-node { padding: 18px 16px; border-radius: 14px; background: var(--ink); color: #fff; font-weight: 700; font-size: 15px; writing-mode: horizontal-tb; }
.flow-split { display: grid; gap: 28px; padding-left: 0; }
.lane { display: grid; grid-template-columns: 1fr; position: relative; padding: 14px 16px 14px 34px; margin-left: 18px; border-radius: 12px; background: #f4f6fa; color: var(--muted); font-size: 14px; }
.lane::before { content: ""; position: absolute; left: -18px; top: 50%; width: 34px; border-top: 2px dashed #b8c3d6; }
.lane i { height: 4px; margin: 10px 0; border-radius: 4px; background: repeating-linear-gradient(90deg, #b8c3d6 0 12px, transparent 12px 20px); background-size: 40px 4px; animation: move 1.4s linear infinite; }
.lane b { color: var(--ink); justify-self: end; }
.lane.hot { background: linear-gradient(120deg, #eaf1ff, #e5f8fc); color: var(--ink); }
.lane.hot::before { border-top-color: var(--blue); border-top-style: solid; }
.lane.hot i { background: repeating-linear-gradient(90deg, var(--blue) 0 12px, transparent 12px 20px); background-size: 40px 4px; }
.lane.hot b { color: var(--blue); }
@keyframes move { to { background-position: 40px 0; } }

/* Steps */
.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { counter-increment: s; padding: 30px 28px; border: 1px solid var(--line); border-radius: var(--radius); }
.steps li::before { content: "0" counter(s); display: block; margin-bottom: 14px; font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.steps b { font-size: 18px; }
.steps p { margin: 8px 0 0; color: var(--muted); font-size: 15px; }

/* Pricing */
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tier { position: relative; padding: 30px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); text-align: center; }
.tier img { margin: 0 auto 14px; border-radius: 16px; }
.tier h3 { font-size: 18px; }
.price { margin: 8px 0 18px; font-size: 30px; font-weight: 800; }
.price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.tier ul { list-style: none; padding: 18px 0 0; margin: 0; border-top: 1px solid var(--line); display: grid; gap: 8px; color: var(--muted); font-size: 15px; }
.tier.hot { border: 2px solid transparent; background: linear-gradient(#fff, #fff) padding-box, var(--grad) border-box; box-shadow: var(--shadow); }
.tag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); padding: 3px 12px; border-radius: 999px; background: var(--grad); color: #fff; font-size: 12px; font-weight: 700; }
.note { margin: 28px auto 0; max-width: 720px; text-align: center; color: var(--muted); font-size: 14px; }

/* Download */
.download { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; padding: 52px; border-radius: 26px; color: #fff; background: radial-gradient(600px 300px at 90% 0%, rgba(25,195,230,.35), transparent 70%), linear-gradient(135deg, #0f1b33, #13306e); }
.download p { color: #c3cee4; }
.download b { color: #fff; }
.ver { font-size: 14px; }
.platforms { display: grid; gap: 12px; }
.plat { display: grid; grid-template-columns: 110px 1fr auto; align-items: center; gap: 12px; padding: 16px 20px; border-radius: 14px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); }
.plat small { color: #a9b6cf; }
.plat span { font-size: 13px; color: #a9b6cf; }
.plat.ready { background: rgba(255,255,255,.12); border-color: rgba(25,195,230,.6); }
.plat.ready span { color: #7fe3f5; font-weight: 600; }

/* FAQ */
details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 4px 22px; margin-bottom: 12px; }
summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--blue); font-size: 20px; line-height: 1; transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0 0 18px; color: var(--muted); }

/* Footer */
.footer { padding: 44px 0; border-top: 1px solid var(--line); }
.foot-inner { display: grid; gap: 12px; }
.disclaimer, .copy { margin: 0; color: var(--muted); font-size: 13px; max-width: 760px; }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid, .split, .download { grid-template-columns: 1fr; }
  .mock { transform: none; }
  .cards, .tiers { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .download { padding: 36px 26px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-inner .btn-sm { margin-left: auto; }
  .hero { padding: 56px 0 64px; }
  .section { padding: 68px 0; }
  .cards, .tiers { grid-template-columns: 1fr; }
  .mock-body { grid-template-columns: 1fr; }
  .mock-side { display: none; }
  .plat { grid-template-columns: 1fr; gap: 2px; }
  .flow { padding: 28px 18px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }